An unequal modulation scheme for the transmission of compressed multimedia data over MIMO-OFDM systems

Athanasiadis, T, Lin, K and Hussain, Z 2006, 'An unequal modulation scheme for the transmission of compressed multimedia data over MIMO-OFDM systems', in H. W. Ngan (ed.) IEEE TENCON, Hong Kong, 14-17 November 2006, pp. 1-4.


Document type: Conference Paper
Collection: Conference Papers

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Title An unequal modulation scheme for the transmission of compressed multimedia data over MIMO-OFDM systems
Author(s) Athanasiadis, T
Lin, K
Hussain, Z
Year 2006
Conference name IEEE TENCON
Conference location Hong Kong
Conference dates 14-17 November 2006
Proceedings title IEEE TENCON
Editor(s) H. W. Ngan
Publisher IEEE
Place of publication Piscataway, USA
Start page 1
End page 4
Total pages 4
Abstract Modern video/image source coders employ data compression techniques which encode information that are not equally important. Transform based or subband coders, compress data into their respective low-frequency and high-frequency components. In wireless/mobile communication systems, data representing the low-frequency components are more sensitive to the time-varying nature of channel conditions and propagation environments. To deal with this problem, we propose an optimum transceiver structure for a combined source-modulation coded MIMO-OFDM system with adaptive eigen-beamforming. Using an unequal adaptive modulator, we maximize the channel-to-noise ratio (CNR) based on a lookup matrix-adaptive bit and power allocation (LM-ABPA) scheme to sort and allocate subcarriers with the highest SNR to the low-frequency components of the compressed data, and adjusting the signal constellation/modulation type respectively. In comparison to other transmission systems, simulation results based on the application of compressed images showed that the proposed unequal adaptive modulation scheme achieves significant performance gains under a constant data rate load
Subjects Signal Processing
DOI - identifier 10.1109/TENCON.2006.344082
Copyright notice © 2006 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
ISBN 1-4244-0548-3
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